Best Answer

-- Drop 20 pennies or little stones onto a small patch of bare ground.

-- Drop 40 more pennies or little stones onto the same place.

Do it carefully, so that you don't scatter them.

-- Pick up all of the pennies or little stones and count them.

The number you have is the sum of 20 and 40.

Q: How do you find the sum of 20 and 40?

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20 + 40 = 60

the answer to 20 + 20 = 40

the sum for 20 + 40 + 70 + 80 = 210

The sum of the first 20 even numbers... is 110

20 of them

Related questions

20 + 40 = 60

It is: 20+20 = 40

the answer to 20 + 20 = 40

-69

the sum for 20 + 40 + 70 + 80 = 210

20+20=40 20x20=400

The sum of the first 20 even numbers... is 110

20.

The sum of two numbers between 20-40 is 58. The difference is 12

440

20 and 20.

2,4,8,10 and 16 are factors of 400.